The game resets at random during play.

Jurassic Park, Last Action Hero, Tales from the Crypt: random resets in play

Cause: The metal grounding plate behind the backbox boards bows and touches the +5 V on a board, most often the sound board near its CN2.

Checks

• Look for rub marks between the plate and the back of the sound board.

Fix

• Remove all backbox boards (label the connectors) and remount the plate flat.
• Or fix a thick, non-conductive insulating sheet to the plate behind the sound board at CN2 that cannot be punctured.

Systems

• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Games

• Jurassic Park
• Last Action Hero
• Tales from the Crypt

Related tips

• Jurassic Park, Last Action Hero, Tales from the Crypt: flipper dead from its EOS switch
• Jurassic Park, Last Action Hero: flipper return springs break
• Last Action Hero: flasher test fires coils instead
• Last Action Hero: CPU and display EPROM types and latest versions
• Sounds suddenly come out wrong even with new ROMs: bad ribbon cable
• Jurassic Park can have either PPB
• Jurassic Park: random coils, blown fuses and switch shorts
• Random coils firing and dead flashers on Tales from the Crypt

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)